The Sadness (2021) Link

They are driven by their darkest, most sadistic impulses, acting on hyper-violent and lecherous urges with zero remorse.

The infected retain their intelligence, ability to reason, and speech. The Sadness (2021)

Unlike standard zombie films where victims become mindless drones, the "Alvin" virus in The Sadness mutates to strip away human moral restraints. They are driven by their darkest, most sadistic